Multiple-control device



May 27,1930. J. J. MITCHELLAk 1,760,710

l MULTIPLE CONTROL DEVI-CE INVENTOR ATTORNEY May 27, 1930. J. J.MITCHELL MULTIPLE CONTROL DEVICE Filed Janfzs. 1929 s sheets-sheet 2'grae ATTOR NEY J. J. Mrrcl-IELI.-

MULTIPLE CONTROL DEVICE May 27, A1930.

3 Sheets-Sheet `C5 Filed Jan. 2 5, 1929 l' yl m gil l'/ l Y CRP-za lH mla* Null INVENTOR ATTORNEY Patented May 2?, 193@ y UNETE@ STATES PA'EENT@FFQE MULTPLE-CONTROL DEVICE Application led January 25, 1929. SerialNo. 335,13?,

rllhis invention relates to multiple control devices, an object being toprovide means whereby a. plurality of separate devices or elements maybe controlled through the manipulation of a single operating lever, theinvention being especially adapted for use in connection with excavatingor dredging machines using a bucket of the clam shell type.

For this purpose, the invention provides a control device which isvadapted for many uses, and when used with a machine of the abovecharacter, provides means whereby through the operation of a singlelever the l5 bucket may be manipulated to raise or lower the same ineither a closed or open position.

With the above and other obj ects in view, the invention furtherincludes the following novel features and details of construction, to

be hereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claims.

In the drawings Figure 1 is an elevation partly broken away with partsin section illustrating the invention in a neutral position.

Figure 2 is a like view with one of the individual control members movedto an active position.

Figure 3 is a similar view with both of the individual control membersin active po` sition. l

Figure et is a like view showing the individual control members in areverse position from that shown in Figure 1.

Figure 5 is an elevation with both of the individual control members ina position reverse to that shown in Figure 3.

Figures 6, 7 and 8 are sectional views taken respectively on the lines 66, 7-7 and 8-8 of Figure 5.

Referring to the drawings in detail wherein like characters of referencedenote corresponding parts, the invention which is capable of many uses,will be described in connection with the operation of the bucket of anexcavating or dredging machine, the bucket and its mounting however notbeing illustrated.

The invention comprises a suitable casing which includes spaced plates10 between which are slidingly mounted individual control members in theform of bars 11 and 12. ylhese bars are guided between rollers 13 and11i which are positioned between the 5,5

plates 10 and which act to connect the'plates in spaced relation.

The opposite ends of the bar 11 are adapted for connection with a cableor cables 15 whichhave suitable connection with means @0 to open andclose la bucket. In other words, movement of the bar 10 in one directionwill close the bucket while movement in an opposite direction will openthe bucket.

he bar 12y is adapted to have its opposite Q5 ends connected with acable or cables 16 which lead to suitable elements or devices forhoistingI or lowering the bucket, depending upon the direction ofmovement of the bar 12.

For the purpose of moving the bars'11 and 12 the invention provides amain control bar 17 which is vmounted for sliding movement between theplates 10 through the medium of rollers 18. These rollers like therollers 13 7.5 and 14 also act as spacing and connecting means for theplates 10.

` rlhe bar 17 is movable transversely ofthe bars 11 and 12 and thesebars 11 and 12 carry spaced rollers 19 which ride upon the 8.0 edges ofthe bar 17. The bar 17 is offset intermediate its ends so as to provideoppositelyinclined portions 20 and 21 which are connected by a straightportion 22 which is on a line parallel with the direction of movement ofthebar 17. The bar 17 is also provided with a notch 23 in one edgeadjacent the inclined portion 20.

ln Figure 1 the parts are shown in neutral position, that is, with thebucket open and 9() lowered.

By moving the main control bar 17 in the direction of the arrow shown inFigure 1 of the drawings, one of the rollers 19 of the individualcontrol bar llwill be caused to c ride upward along the inclined portion2O of the bar 17 to the position shownin Figure 2. 1n this position thebucket will be closed. Movement of the main control bar 17 may beeffected by suitable means, such for eX- ico 2 i meomo 11 to enter thenotch 23 oi" the bar 17 andY equalize the pull upon the cable or cables15 so that the bucket Will remain closed. movement of the bar 17 willalso cause one of the rollers 19 of the bar .12 to ride upthe inclinedportion 2O of the bar 17 so that the bars 11 and 12 will occupy theposition shown in Figure 3 lWith the bucket closed and in.

hoisting` position. To stop hoisting movement o1" thebncket the bar 17is moved in a .reverse direction until the bar 12 returns to neutralposition.v While to open the bucket to release its contents the bar 11is returned to neutral position.

In order to hoist the bucket with the latter in open position thevbar 17is moved to the position shown in Figure 1- of the drawings.

The rollers 18 are preferably circumferentially curved as shovvn at 27in Figures 6 and 7 of the drawings. The bars k11 and 12 are formed ofspaced members as shown in Figur 8 so as to provide for the passage ofthe bar 17 therebetween.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserve-d tomake such changes as properly fall Within the scope of the appendedclaims.

Having described the invention `what i. claimed is:

1. In a multiple control device for excavating machines, spaced parallelslidingljy mounted individuall control bars, one of said bars beingadapted to have its opposite ends connected With mea-ns toV open andclose the bucket oan excavating inachine, and the other of said barsadapted to have its opposite ends connected with bucket raising andlowering means, a main control bar slidable transversely of and engagingthe individual bars, an offset portion included in the main control barto selectively operate the individual control bars, said oiset portionincluding an intermediate straight section and reversely inclinedsections, and cooperating means between the main control bar and one ofthe individual control bars to provide an equalizing position 'for thelatter.

2. ln a multiple control device for encalvat ing machines, spacedparallel slidingly mounted indivi-dual control bars. one of said bearsbeing adapted to have its opposite ends connected with means to openandclose the bucket oi an excavating machine, and the other of said barsadapted to have its opposite ends connected With bucket raising and Thislowering means, a main control bar slidable transversebT 'of andengaging the individual bars, means included in the main control bar toselectively operate` the individual control bars, said main control barhaving a notch in one edge, and means carried by one of the. individualcontrol bars to engage Within the notch and provide an equalizingposition 'for said individual control bar. Y

Intestimony whereof I alieni mv signature.

' Jnssn J. MITCHELL.

